#include "EventLoopThread.h"
#include "EventLoop.h"

EventLoopThread::EventLoopThread(const ThreadInitCallback &cb, const std::string &name)
    : loop_(nullptr), exiting_(false),
      thread_(std::bind(&EventLoopThread::threadFunc, this), name), mutex_(), cond_(), callback_(cb)
{
}
EventLoopThread::~EventLoopThread()
{
    exiting_ = true;
    if (loop_ != nullptr)
    {
        loop_->quit();
        thread_.join();
    }
};
EventLoop *EventLoopThread::startLoop()
{
    thread_.start(); // 构造启动一个新线程
    EventLoop *loop = nullptr;
    {
        std::unique_lock<std::mutex> lock(mutex_);
        while (loop_ == nullptr)
        {
            cond_.wait(lock);
        }
        loop = loop_;
    }
    return loop;
};
void EventLoopThread::threadFunc()//初始化线程中运行的任务
{
    EventLoop loop;
    if (callback_)
    {
        callback_(&loop);
    }

    {
        std::unique_lock<std::mutex> lock(mutex_);
        loop_ = &loop;
        cond_.notify_one();//条件变量表示loop已经构造完成
    }
    loop.loop();//开启事件循环
    std::unique_lock<std::mutex> lock(mutex_);
    loop_ = nullptr;
};